Department of Partial and Complete Denture, School of Life Dentistry at Tokyo, The Nippon Dental University.
J Oral Sci. 2023;65(3):195-198. doi: 10.2334/josnusd.23-0101.
To clarify the presence or absence of differences in path pattern and movement during mastication between the habitual and non-habitual chewing sides.
Participants were 225 healthy adults with natural dentition. Mandibular movement while chewing gummy jelly on each side was recorded, and masticatory path pattern was classified into five types (one normal and four abnormal). The frequency of each pattern was measured and compared between chewing sides. The amount, rhythm, velocity, and stability of movement and masticatory performance were measured and compared between chewing sides.
A normal pattern was observed on the habitual chewing side in 84.4% of participants. There was a significant difference between chewing sides in masticatory path pattern (χ = 35.971, P < 0.001). Values of parameters regarding the amount and velocity of movement and masticatory performance were significantly higher on the habitual chewing side. Values of parameters regarding rhythm and stability of movement were significantly lower on the habitual chewing side.
The present findings of functional differences between chewing sides in terms of path pattern and movement during mastication suggest that these factors should be analyzed on the habitual chewing side.
明确习惯性和非习惯性咀嚼侧咀嚼时路径模式和运动是否存在差异。
研究对象为 225 名具有天然牙列的健康成年人。记录咀嚼每侧 gummy 果冻时下颌的运动，将咀嚼路径模式分为五种类型（一种正常和四种异常）。测量并比较咀嚼侧的每种模式的频率。测量并比较咀嚼侧之间运动和咀嚼性能的量、节奏、速度和稳定性。
84.4%的参与者在习惯性咀嚼侧观察到正常模式。咀嚼侧的咀嚼路径模式存在显著差异（χ=35.971，P<0.001）。运动的量和速度以及咀嚼性能的参数值在习惯性咀嚼侧显著更高。运动的节奏和稳定性的参数值在习惯性咀嚼侧显著更低。
本研究发现咀嚼时路径模式和运动方面咀嚼侧之间存在功能差异，提示应在习惯性咀嚼侧分析这些因素。
